4.24.4 DC-DC Supply Cable Harness
Figure 4-235 DC-DC Harness
NOTE
J4 for the Potted DC-DC is not shown.
4.24.5 DC-DC Harness Removal and Installation
4.24.5.1 DC-DC Harness Removal
1. Isolate the compressor power as described in Section 1.8 Electrical Isolation on page 22.
2. Remove the Service Side Cover. Refer to Section 4.1.3.1 Service Side Cover Removal and Installation on
3. Disconnect the two (2) motor thermistor connections from the Motor Top Plate.
4. Disconnect the 24 and 250VDC output from the DC-DC. Refer to Figure 4-229 Potted DC-DC on page
206 and Figure 4-230 Open Frame DC-DC on page 206 for further details.
5. Remove the Soft Start Temperature Harness Connector. The two (2) different Soft Start variants have a
change in these connectors. Both are approximately in the same location.
a. For Closed-Top Soft Starts, disconnect the J9 connector. Refer to Figure 4-99 Closed-Top Soft Start
b. For Open-Top Soft Starts, disconnect the J7 connector. Refer to Figure 4-104 Open-Top Soft Start J7
6. Carefully cut any cable ties that may be securing the cable harness in place both at the top side and
service side.
7. Disconnect J4, J20, J22, and J24 from the Backplane. Refer to Figure 4-238 Backplane Connections on
8. Carefully pull the harness down through the cable passage on the Service Side and remove. Refer to
Figure 4-236 DC-DC Harness Routing on page 210.
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Summary of Contents for Turbocor TT Series
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